I fitted the Milltek system because my standard exhaust was rattling, but when the car was up on the ramp at rapid fit I noticed the exhaust silencer was touching the heat shielding between silencer and car chassis. The fitter at rapid fit said that I had obviously been going through puddles too fast as it was the force of the water which slightly bent the heatshielding and caused it to occasionally strike and rattle against the exhaust silencer. So turns out I didn't need new Milltek after all . But I had planned to get one anyway to be fully stainless all the way through.

So mate check all round the silencer area for buckled heat shielding, chances are your exhaust will be fine.

As for fitting it yourself, rapid fit only asked £20 from me. They had to use blow torch to remove nuts and bolts so wasn't a doddle.